On 4/22/2013 1:18 PM, Tom Bishop wrote: > Sure but if you read WD on documentation on at least parity RAID > requirements, that specify URE 10^15, and these list out to 10^14. If you > are going to run RAID 5 or 6 with the 3gb disks, sounds like that might not > be the best situation but something to think about. dont put more than 10-12 disks in a single raid stripe and allow at least 10% hot spares. my monster raids built from 3TB SATA drives rebuild from a single drive failure in about 12 hours, and have 2 spares online, so it would take 3 drive failures in less than 12 hours to take the file system down. never rely on cold spares in storage, they won't be there 3 years from now when you need them, and every hour the spare isn't replaced, is another hour added to the rebuild time leaving you open to more fail. -- john r pierce 37N 122W somewhere on the middle of the left coast